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Speedmaster Cast Aluminum Cylinder Head Big Block Mopar 383/440 w/Hydraulic Flat Tappet Cam

746-PCE281.2140


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Speedmaster PCE281.2140
$1,205.60
4 left in stock
Cast Aluminum Cylinder Head
  • Big Block Mopar 383/440 w/Hydraulic Flat Tappet Cam
  • Assembled Head
  • 74cc Combustion Chamber
  • 265cc Intake Runner
  • Includes Valves & Springs
  • Set of 2
  • Free Shipping - Ships
    QTY
    PCE281.2140 is rated 1.0 out of 5 by 1.
    Rated 1 out of 5 by from Worst machine work on the market I purchased a set of these heads and had to do a lot of material removal for pushrod clearance. On top of that they require a .750 to .800 offset rocker to run a 3/8 pushrod. After that they had to be ripped down and re lap the calves cause they where not done right. After the break in and dyno tune with engine in the car a valve broke and ruined the entire engine. The heads have been sent in and welded re milled and all Manley valves on my new build. In the end these heads cost me almost 10k because of the failure and building another engine. Please do not run these with the hardware they are built with or you are really taking a gamble.
    Date published: 2020-04-12
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    Do these require offset rocker arms

    Asked by: Craig440
    Yes, these are the recommended rocker arms - https://www.jegs.com/i/Speedmaster/746/1-261-026/10002/-1
    Answered by: Rusty B
    Date published: 2019-03-11

    Will the bear cast heads ( not cnc ) capable of making 500 to 550 hp with 10.51 compression with a 600 lift cam and a 850 carb

    Asked by: Ronalda
    Yes, with the right accessories this would be capable of making 500 hp.
    Answered by: Rusty B
    Date published: 2018-09-25

    Is it possible to get 11 to 1 compression using Wesco flat top pistons by Milling the heads

    Asked by: Ronalda
    We offer a number of pistons that will be around 11:1 without milling these heads.
    Answered by: Rusty B
    Date published: 2018-09-10

    What is the compression using flat top Wesco Pistons

    Asked by: Ronalda
    The compression when using a Wiseco flat top piston with this cylinder head will be approximately 10.2:1
    Answered by: Rusty B
    Date published: 2018-09-08

    What would the compression ratio be with flat top pistons with these heads

    Asked by: Ronalda
    We would need to know what pistons you were using.
    Answered by: Rusty B
    Date published: 2018-08-29

    What is the max horsepower these heads will make

    Asked by: Ronalda
    Many factors involved in that, these will make at least 750 hp in the right installation.
    Answered by: Rusty B
    Date published: 2018-09-05

    Do these heads clear a stock distributor and do they have stock accessory mounting holes?

    Asked by: ExWrench
    Yes, these heads will work with a stock distributor and should have most accessory holes.
    Answered by: Rusty B
    Date published: 2018-04-23

    The add shows heads with valves and springs and the main description states "complete", but the bulleted details say "bare." Which is it, complete or bare? Do these heads fit std 440 intake and exhaust flanges?

    Asked by: ExWrench
    This is a completely assembled cylinder head. and will fit the standard 440 accessories.
    Answered by: Rusty B
    Date published: 2020-04-12
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